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authorThomas Hellstrom <thomas-at-tungstengraphics-dot-com>2008-08-24 07:00:00 (GMT)
committerDave Airlie <airlied@linux.ie>2008-08-24 20:35:21 (GMT)
commite5b4f19417b75a2d7c1e36934f60a3e836c4337e (patch)
tree1daed2d024ce8f1b0ce586ceb29159d908a9bb4b /drivers/gpu/drm/drm_lock.c
parent649ffc06a62bf487b78440669bdfeb637f1d675b (diff)
downloadlinux-e5b4f19417b75a2d7c1e36934f60a3e836c4337e.tar.xz
drm: don't call the vblank tasklet with irqs disabled.
If a specific tasklet shares data with irq context, it needs to take a private irq-blocking spinlock within the tasklet itself. Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_lock.c')
-rw-r--r--drivers/gpu/drm/drm_lock.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/drivers/gpu/drm/drm_lock.c b/drivers/gpu/drm/drm_lock.c
index 0998723..d78e0dc 100644
--- a/drivers/gpu/drm/drm_lock.c
+++ b/drivers/gpu/drm/drm_lock.c
@@ -150,6 +150,7 @@ int drm_unlock(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
struct drm_lock *lock = data;
unsigned long irqflags;
+ void (*tasklet_func)(struct drm_device *);
if (lock->context == DRM_KERNEL_CONTEXT) {
DRM_ERROR("Process %d using kernel context %d\n",
@@ -158,14 +159,11 @@ int drm_unlock(struct drm_device *dev, void *data, struct drm_file *file_priv)
}
spin_lock_irqsave(&dev->tasklet_lock, irqflags);
-
- if (dev->locked_tasklet_func) {
- dev->locked_tasklet_func(dev);
-
- dev->locked_tasklet_func = NULL;
- }
-
+ tasklet_func = dev->locked_tasklet_func;
+ dev->locked_tasklet_func = NULL;
spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);
+ if (tasklet_func != NULL)
+ tasklet_func(dev);
atomic_inc(&dev->counts[_DRM_STAT_UNLOCKS]);